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Finding the Fourth Proportional to 1,047.32, 1,444.84 and 715.20

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Solution

The fourth proportional to 1,047.32, 1,444.84 and 715.20 is: 986.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,047.32 : 1,444.84 = 715.20 : x
  2. Step 2: Convert to fraction form
    1,047.32/1,444.84 = 715.20/x
  3. Step 3: Cross multiply
    1,047.32x = 1,444.84 × 715.20
  4. Step 4: Simplify right side
    1,047.32x = 1,033,349.57
  5. Step 5: Solve for x
    x = 1,033,349.57/1,047.32
  6. Step 6: Final answer
    x = 986.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.